{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "545502",
    "entityType": "User",
    "nonce": "0x8d504dad52d1f9b9994912ba050f4a8f6904e3c25edaea656baea899b18d8be7",
    "signature": "0x190e371fe2ca9e5c76202e8893234c520ae3b4ec8b864fad3c3e70a5c4f0649d7665e47c582ef922731e24bf064ba3dd8ffe91bd47be2e8006ed0b0d2e2e21f91c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}